Air filter



prr Z, i937., F. L. MYERS 2,977,95

' AIR FILTER Filed June 4, 1955 INVENTOR.

A TTORNEY Patented Apr. 20, 1937 f PATNT OFFICE AIRFILTER Frank L. Myers, Newark, Ohio, assigner to Owens-Illinois Glass Company, a corporation /Appueanon June 4, 1935, serial No. 24,859

3Claims.

My invention relates to filter installations for Y use in filtering air and other gases.

An object of the invention is to provide an improved means for retaining filter units Within the cells or framework in which they are installed, such retaining means being designed to facilitatethe quick installation or removal of the filter units and also to securely hold them in position within the cells.

A further object of the invention is to provide an improved sealing means for preventing air leakage between the filter units and the walls of the cells in which they are installed.

, Other objects of the invention will appear hereinafter.

In the accompanying drawing:

Fig. l is a perspective view showing a pair of filter units and a portion of the framework in which they are installed.

Fig. 2 is a transverse section at the line II-II on Fig. 1.

Fig. 3 is a fragmentary part sectional plan view.

Fig. 4 is a fragmentary perspective view of a. sealing gasket.

Filter units i0 and II, herein shown as of conventional construction, are mounted in a supporting framework I2. Each filter unit comprises a body I3 of fibrous material such, forexample, as glass fibers in matted form and coated with an oily or viscous, dust-catching material. This body I3 may comprise comparatively coarse fibers forming the front or intake portion of the filter, and finer material comprising the rear portion of the filter. The filter body I3 is supported in a rectangular container. made of paper, cardboard or other suitable material. The front and rear faces of the filter may each be 'covered with a screen or grill; I6 of openwork material surrounded by a frame I5 forming part of the container I 4 in which the filter body is supported.

The framework I2 comprises vertical frame members I1 and horizontal frame members I8 whichtogether provide rectangular cells to receive the filter units. The vertical members I1 have their rear marginal portions inturned to provide flanges I9. The horizontal frame members I8 are likewise provided with flanges 20. Metal strips 2l which may overlie the lflanges 20 extend above the faces of the frame members I8 and also provide marginal fianges. These iianges I9, 20 and 2| provide bearing surfaces which extend along the marginal portions of a filter unit I0 when the latter is placed in position.

In order to prevent air leakage between the filter units and the surrounding cell walls, rectangular gaskets 24 are interposed between the filter units I Il and the stop flanges I9, 20, 2|. The gasket may comprise a frame 25 consisting of a thin strip of sheet metal or other suitable material and a strip 26 of felt or like soft, compressible material adapted to form a seal. The gasket is provided with retaining tabs 21 which may be formed integral with the gasket frame 25. When the gasket is placed in position within the framework l2, the tabs are bent over the adjoining flanges of the framework, thereby re-v movably securing the gaskets in position.

As shown, two filter units are placed in superposed relation in each cell, although either a single unit or more than two units can be installed in each cell, the depth of the cells and the l thickness of the filter units being made to correspend with the number of units installed in each cell.

The units are retained in position by means of a retaining bar 3Il which may be made of sheet metal and comprises a U-shaped body which slidably engages the front margin of the horizontal frame member I8, and an upturned flange 3| adapted to bear against the upper margin or fiange I5 of the filter unit. The frame member I8 is formed with a slot 32 extending inwardly from the front edge of the frame member and diagonally thereof, as shown in Fig. 3, so that said slot forms an acute angle with said front edge. A holding pin 33 extending through the body 30 and the retaining strip, centrally thereof, and riveted or otherwise secured thereto, is adapted to enter the slot 32, thereby holding the retaining strip in position to bear against the front face of the filter unit. The forward edge of the slot 32 is formed with corrugations or teeth 34 which are preferably in the form of rounded lugs adapted to securely hold the retaining strip against accidental movement. v

The slot 32 is inclined at an angle such that when the retaining strip -is placed in position for the pin 33 to engage the slot, and then shifted lengthwise, it is cammed or wedged inward in a manner to clamp the filter unit and hold it securely in the frame and in snug contact with the sealing gasket. The corrugations 34 effectually prevent any accidental shifting of the retaining bar which would loosen the filter unit, while at l the same time permitting instantaneous removal of said bar when it is desired to remove the filter Modiiications may be resorted tofwithin the spirit and scope oi my invention.

I claim:

1. The combination of a framework comprising a cell to receive a illterunit, a retaining ing framework comprising a cell within which the unit is mounted, said framework including walls defining and extending substantially at right an- 20 gles to the face of said cell and filter unit, one

of said walls having a slot therethrough extending inwardly from and at an angie to the iront edge of said Wall, a retaining strip adapted to bear against the front face of the lter unit,

and a pin in said strip uiitting in and coacting with said slot. whereby lengthwise movement of the retaining strip will cam it inward into clamping engagement with the iilter unit.

3. In a battery of iilter unit cells having an interjacent wall common to and between each pair of adjacent cells within which are mounted individual lter units, a retaining strip comprising a U-shaped body embracing the front marginal edge of said wall, two flanges on said U- shaped body, one of said ilanges attached to each of the free-ends of said U-shaped member on opposite sides of said Wall, each oi.' said flanges adapted to bear against the iront face ot its adjacent illter unit respectively, said interjacent wall having a slot therethrough opening inwardly from the i'ront edge thereof and extending laterally at an acute angle to said edge, and a cooperating pin secured to the retaining strip and adapted to enter said slot and cam said retaining strip inwardly into clamping engagement with each oi' said adjacent iilter units.

FRANK L. MYERS. 

